Hi meanest...(like the nick). Have a go with the tutorial in the link in my sig and see if that helps. If you are after a more graphic (less sattelite) look then don't use the realistic textures mentioned. For the handdrawn mountains there are good tutorials in the tutorial section as to how to make these.
It's not difficult to make good texture based maps, but (IMO) it is harder to make good graphic handdrawn maps altough with both I think it's more a question of procedure and technique than talent or artist ability, but most of all practice and play.
Also check out the 'quickstart' sticky in the tutorial section which should set you on your way. If you've got a tablet you're already well ahead of the game in the potential to produce great looking maps!